rinsche



Nov. 25, 19,24. 1,516,685

' F. C. RINSCHE SHOCK ABSORBER FOR P'APER CARRIAGES Filed Oct. 10, 2 Sheets-Sheet 1 ,1 TTORNEY L'VVENTOR F." c. RINSCHE I SHOCK ABSORBER FOR PAPER CARRIAGES Nov. 25 1924;

2 Sheets-Sheet 9 Filed Oct. 10 192 wr/ Ili 0 U a spring motor, the principal f invention being to ionmq mechanism Patented Nov. 25, 1924.

UNITED STATES PATENT OFFICE.

FRANK C. IBINSOHE, OF DETROIT, MICHIGAN, ASSIIEGNOR T0 BURBOUGHS ADDING IACHINE COMPANY, OF DETROIT,

MICHIGAN, A CORPORATION OF MICHIGAN.

snocx ABSORBER son earns (manners.

pplleation filed October 10, 1921. Serial No. 506,701.

To all whom it may concern: Be it known I, FRANK C. citizen of the United States, 4 Detroi in the county of Wayne and btate of Michigan, have invented certain new and useful Improvements in Shock Absorbers for Paper Carriages'of which the following is a specification;

My invention relates to tabulating means or equipments for adding machines and the like, and more particularly to that type of machine in which the paper carriage is propelled from one columnar position to another under the impulse of a motor, usually object of the rovide improved 'cushor absorbing the shock or relieving the force of the impact of a tabulator dog or pawl on the carriage against an arresting or stop member.

with the above and incidental objects in view, the invention consists in certain novel features of construction and combinations of arts, the essential elements whereof are recited in the appended claims. and the preferred form of embodiment of which is described in detail hereinafter and illustrated in full in accompanying. drawings, which form part of this specification.-

Of said drawings, Fig. 1 is arear eleva- Rmscnn, a

tion of an adding machine with parts of the carriage and back plate broken away to disclose the construction, embodying the present invention, more clearly toviewi Fig. 2 is a detail section on the line 2-2 of Fig. 1; Fig. 3 is a detail section through the carriage and the cushioning device, the sec- .tion being taken on the line 3-3 of Fig. l;

Fig. l is a section through the dash pot on the. line 4-l of Fig. 3-, and Fig. 5 is a detail rear elevation of the cushioning device with thedash pot shown in section'and theparts'inthe positions which theyfv assume when a tabulating stop the yielding stop plate.

I am aware that-the use of a dash pot as a. cushioning device for a laterally, shiftable paper carriage, and especially for such carriages on typewriting machines equipped with tabulating mechanisms, is broadly not new, but such dash pots have only been used, so, far as. I' know, to cushion or absorb the rebound orv recoil shock of the carriage and parts, .a spring being employed as the primary cushioning device to relieve the residin atf ing device as j is disengaged from shock when the tabulator stop on thevcarriage collides with an arresting or fixed stop. In such prior constructions. as generallyexemplitied by Patent No. 1.1242199, granted to C. 'l. Frantz, January 5, i915, and Reissue Patent No. H.408, granted to C. T.

Frantz, December ll, 191?, the carriage during a tabulating operation is moved to- :wards the left past the predetermined columnar position .by the inertia or momenztum of the carriage and the cushion spring,

which takes or absorbs the initial shock,

stops the carriage at the end of itsrun, and then the carriage, due to energy stored up in the spring and the recoil of the carriage. is moved in the opposite direction and the dash pot is then called into play to cushion the rebound movement of the carriage. In these prior constructions the dash pots are mounted .on and carried by the carriages. y

In the present invention, the dash ot is associated with a sliding stop plate and both are mounted independently of the carriage on the frame of the machine and are so constructed that the dash not absorbs the shock due to the impact of a tabulator stop on the carriage against the sliding stop plate while the carriage is being moved directly to its predetermined position under the influence of the carriage spring drum, the parts being so to eliminate, as far as possible, any recoil or rebound ofthe carriage or parts. It will beapparent that very important advant iges are obtained the frame of the machine instead of on the carriage and ust explained, as no weight is added to. nor change made in the carriage and no time is lost due to vibrationrof the carriage, while at the same time -,tlie ,mech anism is extremely simple, highly etficient, practically noiseless, and readily adaptable to commercial machine nowon theimarket and in use, injury to thecarriage pants is avoided, and accidental displacement of the proportioned and adjusted as by mounting the dash pot on by constructing the cushionadjustable tabulating stops onthecarriage pirate or panel hinged to the base frame.v

ounted on the back panel 11 is the customa carriage track 12 upon which the shiftable paper carriage 13 is adapted to run. A rock shaft 14 is mounted in the carnage and supports the usual tabulator or columnar sto s or dogs 15, which are manuall adjusta le on the shaft 14 in a manner we understood in the art.

In lieu of the fixed or stationary-stop, heretofore used in the Burroughs adding machine, is a yielding stop bar 17, having a shoulder 18 against which the columnar dogs 15 abut or collide toarrest the carriage in its predetermined columnar positions. The use of the fixed stop is obJectionable as the impact of the tabulating stops on the carriage against it makes an ob ectionable noise and sometimes results in breakage of the carriage parts or displacement o the tabulator stops and the present invention overcomes these objections. As best shown in Fig. 2, the stop bar 17 is provided near its ends with inwardly extending (and preferably integral) spacing i1 ars or studs 19 which are redumd to orm slide bearings 20 and still further reduced to form ends, which are screw threaded. The bearings 20 on the studs 19 are positioned in elongated slots 22in the back panel 11 and the reduced screw threaded ends, which carry nuts on their outer ends, extend through apertures in a plate 23. Theright hand stud 19 (as viewed in Figs. 1 and 2) is provided with wings or pfli'ections 24 which rest against the ack pane 11 to hold the plates 17 and 23 in vertical planes and prevent any rocking vibration of these lates about the bearings 2), there being sufcient lay between the plate 23 and the annular oulders of the studs 19, contacting with the outer side of the back panel, to prevent binding cr undue friction between the back panel and plate 23 or studs 19. One

ported in the bifurcated end of a and of the late 23 carries a stud 27 u n which is he d by a headed screw a sh ing bearing block 28 positioned in an elongated slot 29 in one arm of a yoked lever 30 which is pivoted on the back panel of the machine b a'stud 31 pro'ecti through a sleeve 26 w 'ch is fastened in the arms of the lever. The upper end of the other arm of the lever 80 is provided with a slot 32 in which is located a sliding bearing block 33 supplunger rod 84by a bolt 35. The piston rod is carried b a piston or plunger 36 of the dash pot, cylinder or casing 37 of the dash pot supported on a bracket 38 secured to thebac panel 11. The end or head of the cylinder is provided with a. small hole 39 (Fig. 4), the passage of air therethrough be' regulated by the adj ustable acrew 40, as will be explained presently. The lower end of the lever 30 is connected by a spring 42 to the frame of the machine, and this spring is preferably weaker or of ii the air in the das iston or lesser tension than the spring of spring drum 44 for propelling the carriage during tabulating operations, the spring drum being connected to the carriage by the usual d a is cudom in the Burroughs adding machine, a slide r- 47 (Fig. 1) is reciprocated vertically upon each operation of the machine thro connections to the main rock shaft to e evate a pawl 48 whichcoacts with the particular tabulator stop 15 in engagement with the shoulder 18 on the stop plate 17, to disengage the same and permit the carriage to be moved to its next or selected columnar position by the spring drum 44.

From the above description, it will be obvious that when a columnar dog 15 is disengaged from the shoulder 18 of the stop plate '17 during an operation of the machine, the spring 42 rocks the lever 30 and thereby moves the iston 86 and the slide lates 18 and 23 to t e positions shown in Fig. 5, this movement being limited b the engagement of the bearin portions 28 of the studs 19 against the en of the slots 22. During the last increment of movement of the carriage to its next columnar or predetermined 001- umnan position, under the influence of the i 8 ring drum, the proper stop 15 engages t e shoulder 18'whereupon the stop plate 17, I

slide plate 23 and lever 30 are moved to the positions shown in F opposition to the action of t e spring 42 and the dash pot The first eilect or result of the impact of the tabulator stop with the shoulder on the pot -c linder but this does not result in any und or recoil action of the carriage or the movable cushioning parts as the aperture 39 in the piston cy inder is suficiently la to permit the air to escape from the cylinder, thus counteracting or offsetting an tendency of the piston to rebound or recoi As the air is compressed, it is gradually being ex lled through the aperture 39 thereby'gra ually slowing up the movement of the carriage and finally arresting it in predetermined position, thus eliminati any back and forth vibration of the carriage. The: piston 36 contacts without jar with the end of tlie cyhnder of the dashpot (or it may en age with any-other'stationary part or mem r) when the carriage reaches its exact redetermined position and thus' the da pot acts to positively limit the movement of the stop plate and hence of the carriage togard the right (as viewed from the back), t ere being a slight clearance between the bearing portions 20 of the studs 19 ad the ends' of the slots 22 when the piston is in contact a with the end of the shown in Fig. 1. a

As the tension of the spring g2 is less than cylinder, as ,clearly plate 17 is to compress that of the spring drum, itwill be manifest that the stopplate and'the associated parts will be maintained in the position shown in' -F 1g. 1 while the carriage 18 in stationary position and that, when the columnari stop 1:5 is rocked out of engagementw-ith the shoulder on the stop. plate. 17, the spring 42 moves the stop plate and associated parts to thepositions shown in Fig. 5. It will also be clear that the adjustable screw 40. which carries a lock nut 41, is provided to control the rate at which the air is dispelled from the dash pot, thespace between the end of the-screw and t-he'end of the aperture 39 being increased or decreasedaccording to the extent of cushioning efi'ect required. v i

Fig. 5 has been described above as showing the condition of the. cushioning device after a tabular stop has been moved out of contact with the shoulder on the stop plate 17. e

While the invention has been described as applied to the well-known Burroughs adding machine. it is obvious that it may be applied to tabulating machines of other types and it isalso to be-understood that v the embodiment of the invention described is susceptible of various modifications without departure from'the scope and spirit of the invention, as defined in'the appended claims. I

I claim;

1. In a machine of the classdescribed, the combination cf a stationary frame. a laterally shiftable carriage, a motor for moving: the same, a tabulator stop carried by the carriage, a stop member slidably mounted independently of said carriage on said frame and with wh ch, said tabulator stop is adapted to collide to slide the same, means for moving the tabulator stop into and out of cooperative alignment with said .slidable stop member. andadash pot mounted on saidframe independently of said carriage and connected to said member to' gradually stop the carriage during the last increment of movement of the can riage to its predetermined position by said motor.

2. In amachine of the class described, the combination of a stationary frame, a carriapje laterally shift-able thereon. aspring 'for moving the carriage, a tabulator stop carried by thccarriagc. a stop member slidably mounted on said frame independently of said carriage and with which the tabulator stop is adapted to collide to slide the same, means for moving said tabulator stop into and out of operative alignment with said slidable stop member, and a dash pot connected to said member and mounted on said frame' 3. In a machine of the class described. the comhimition of a stationary frame, a

carriage laterally shiftable thereon, a spring for moving the, carriage, a. tabulator sto carried by the carriage, a stop member sli ahly'mounted on said frame independently of said. carriage and with which the taliulator stop is adapted to collide to slide the same. means for moving said tabulator stop into and out of cooperative alignment. with sa d shdable stop member. and a dash pot, comprising a. piston and a cylinder, connected to said member and mounted on said frame. and positively arresting the carriage by engagementof the piston with the end of the cylinder.

4. In a machine of the class described. the combination of a stationary frame. a. carriage laterally shiftablethereon, a spring for moving the carriage. a tabulator sto carried by the carriage, a stop plate sli s ably mounted on said frame independently of said carriage and with which the tabulatop stop is adapted to collide to slide the same, means for moving said tabulator stop into and out of cooperative alignment with said slidable stop member, a dash pot connect,

riage, a'sliding bar mounted on said rrame' andadapted to be engaged and" slidby said tabulator stop to arrest the carriage in predetermined position, means for moving said tabulator stop into and out of cooperative alignment with said slidingbm, a dash pot mounted on said frame and comprising a piston and a cylinder, one of said elements of the dash pot being connected to said bar andmoved in one direction to relieve the impact of the stop. against the bar. and a spring for moving the last mentioned element of the dash pot in the opposite direction. p Y

6. In a machine of the class described, the combination of a frame, a laterallyshiftable carriage, a spring for shifting the carriage, a tabulator stop associated with the carriage, a sliding bar mounted on'said frame and cooperating with said tabulator stop to arrest the carriage in predetermined position. a lever pivoted to said frame, a dash pot mounted on said frame and comprising a piston and a cylinder, one of which elements is connected to said lever and which is moved in one direction to relieve. the impact of the stop against the bar. and a spring connected to said lever for moving the element of the dash pot connected thereto in the opposite direction.

7. In a machine of the class described,

III

the combination of a laterally shiftable for comprising cooperating parts, a' dashpot, comprising a cylinder and piston, associated with said stop mechanism to act as a cushion for said carriage, and an oper-.

siting connection between one of said elements of said daslrpot and one ofsaid parts of said tabulator stop mechanism, for causing said element of the dash-pot to move substantially fuither than said part while the carriage is being arrested.

In a machine of the class described. the,

combination of a laterally shiftable carriage, tabulator stop mechanism therefor comprising a stop on the carriage and a stop with which the first stop collides, a dash-pot comprising a piston and a cylinder, and a lever associated at one end with one of said stops and at the other end with one of said dashpot elements and pivoted so that the element with which it is associated; moves substantially further than the stop with which it is associated while the carriage is being arrested.

0. In a machine of the class described, the combination of a laterally shiftable carriage, tabulating stop mechanism therefor comprising coacting stops of which {is slidable,

a dash-pot comprising a piston and a cylinder. an operating connection between one of said elements of said dash-pot. and said slidable stop so that when the stops collide the element .to which the connectionisassociated moves substantially further than the slidable stop to gradually stop the carriage during the last increment of movement of the carriage to its predeterminatcd position, a spring for sliding the stop in the opposite direction when the stops are disengaged, and means for disengaging the stops.

10. In a machine of the class described, the combination of a laterally shiftable carriage. tabr'ator stop mechanism comprising coacting parts one of which is shdablc, a cushioning device for the carriage, a lever connected at one end to said slidable stop mimosa device and ivotally mounted nearer its connection with the slidable stop than with the cushioning device, so that the latter moves further than the former to gradually stop the carriage during the last increment of movement of the carriage to its predetermined position.

11. In a machine of the class described, the combination of a rear frame, a laterally shiftable carriage, a spring for shiftin the carriage, a tabular sto associated wit the carriage, a cushioning evice mounted on the inside of the frame, a slidable member connected to said device, and a stop on the outside of said frame, carried by said member and adapted to be engaged by said tabulator stop to arrest the carriage.

12.: In a machine of the class described, the combination of a rear frame, a laterally 'shiftable carriage, a spring for shifting",' the carriage, a tabulator stop associated with the carriage, a cushioning device mounted on the inside of the frame, a slidable member connected to said device, a sto element on the outside of said frame, carried by said member and adapted to be engaged by said tabulator stop to arrest the carriage, and means between the frame and stop element for efl'ecting disengagement of the latter from the tabulator stop.

13. In a machine of the clam described, the combination of a laterally shiftable carriage, tabulator stop mechanism therefor comprising cooperating sto s, an air dash pot. comprising a piston an a cylinder from which the air is disspellcd associated with said stop mechanism to act as a cushion for said carriage, and an operating connection,

and at its opposite end tosaid cushioning carriage. tabulator stop mechanism thereincluding a lever between one of said elements of said dash-pot and one of said stops of said tabulator stop mechanism, the lever being pivoted so that said element of the dash-pot moves substantially further than said stop while the carriage is being arrested.

FRANK C. RINSCHE. 

